Hardly anyone really seems to like Trump. His unpopularity is so high that he even beats Clinton, who might be one of the most disliked candidates to ever hit the campaign trail.
But it's Clinton's unpopularity that drives much of Trump's voting base. Despite his incredibly high disapproval rating, the fear of Clinton trumps the fear of Trump. You can often see it expressed in normal conversation when asking why someone is voting for the guy, but it recently came out in the poll numbers too.
http://www.redstate.com/brandon_morse/2016/08/26/poll-majority-people-voting-trump-just-voting-clinton/